US3978567A - Method of making a catalytic reactor for automobile - Google Patents
Method of making a catalytic reactor for automobile Download PDFInfo
- Publication number
- US3978567A US3978567A US05/551,442 US55144275A US3978567A US 3978567 A US3978567 A US 3978567A US 55144275 A US55144275 A US 55144275A US 3978567 A US3978567 A US 3978567A
- Authority
- US
- United States
- Prior art keywords
- substrate
- housing
- ropes
- pair
- grooves
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
- F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49345—Catalytic device making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49801—Shaping fiber or fibered material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49879—Spaced wall tube or receptacle
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49893—Peripheral joining of opposed mirror image parts to form a hollow body
Definitions
- the substrate comprises a porous ceramic core treated with a catalyst for expediting the reaction of certain components in the exhaust gas flowing axially through the core. Because of the comparatively intense heat of the reaction and the constant and often severe vibration of the reactor resulting from gas pulsation and road shock, difficulty has been experienced in cushioning the core to prevent its disintegration after a short interval of operation. Attempts heretofore to grip the substrate firmly within the housing have invariably resulted in excessive frictional wear of the substrate at the location of the gripping elements.
- a resilient steel mesh blanket around the substrate to support the same has been proposed, but attempts to provide such a support heretofore have been costly and have not adequately supported the substrate after the resiliency of the steel wire or fibers in the mesh is impaired by the operational heat of the reactor.
- any attempt to support the substrate in spaced relationship with the sidewalls of the housing so as to prevent frictional wear also preferably provides a gas seal in the space between the substrate and housing, otherwise a large portion of the exhaust gases that should be directed through the porous substrate will bypass the latter and flow through the aforesaid space and be exhausted to the atmosphere without reaction.
- the substrate and housing are preferably of oval cross section transverse to the direction of gas flow and the housing shell sections are clamped together by force directed transversely of the latter direction and also transversely of the shorter axis of the oval section to permit exposure of the maximum surface area of the substrate to the clamping force.
- the wire mesh comprises a pair of wire mesh rope like supports, hereinafter called ropes, extending around the substrate in closed loops transverse to the axial gas flow through the reactor and confined within a corresponding pair of axially spaced grooves in the outer surface of the substrate.
- the porous substrate is formed from a curable plastic by an extrusion process and is thereafter cured or hardened to provide a comparatively soft brittle porous monolithic matrix or core readily subject to abrasion.
- the aforesaid grooves are pressed into the outer surface of the matrix by a suitable die, whereby the dimensions of the matrix at the location of the grooves are readily maintained within close tolerances and the material of the matrix at the grooves is compacted to provide reinforced regions capable of being firmly gripped and supported by the wire mesh ropes.
- the ropes are preferably formed from a multitude of layers of knitted resilient stainless steel wire to comprise a matrix that is subsequently pressed and densely compacted in a die to provide a mesh rope of accurately predetermined cross section dimensioned to fit snugly within the aforesaid grooves and to effect an interference fit between the assembled substrate and housing.
- Each die formed rope is preferably provided with a lengthwise extending groove in its outer surface.
- the housing is preferably formed from sheet steel reinforced by a pair of inwardly projecting ribs or projections formed therein to overlie the grooves in the ropes and to effect an interference fit therein when the two housing shells are assembled around the substrate and forced together to clamp the mesh between the substrate and housing.
- housing shells are preferably formed with a pair of inwardly opening channels associated with each rib and spaced laterally thereby to receive portions of the ropes compacted therein or displaced by the ribs when the housing shells are assembled and pressed together with the substrate therebetween.
- the rope matrices even though a major portion of the resilience of the individual wires or fibers of the matrix is lost in consequence of high temperature operation, the rope matrices will still retain sufficient resiliency to grip and retain the substrate firmly in spaced relationship with respect to the housing. By gripping the support at two axially spaced locations, cocking of the substrate within the housing is prevented. Also the compacted die-formed ropes render it unnecessary to grip the substrate throughout its entire axial length. Of course additional ropes arranged as described may be employed if desired between the first named ropes to enhance the sealing effect or to distribute the load on the substrate over a larger area.
- the initial compacting of the mesh prior to clamping of the housing shell sections together may be minimized without sacrificing the positive substrate support required to prevent relative movement between the substrate and housing.
- FIG. 1 is a longitudinal mid-section through a reactor embodying the present invention.
- FIG. 2 is a transverse section taken in the direction of the arrows substantially along the broken line 2--2 of FIG. 1.
- FIG. 3 is a fragmentary enlarged exploded sectional view of portions of the housing, die formed rope mesh, and grooved substrate of FIG. 1 prior to assembly and deformation of the rope mesh to effect a sealing support for the substrate.
- FIGS. 4 and 5 are plan and sectional views respectively illustrating details of a type of a single layer of knitted wire mesh suitable for use in the rope support.
- a catalytic reactor 10 comprising two sheet steel housing shells 11 flanged and welded securely together at the gas tight seal 12 along the mid-plane containing the major transverse axis of the generally oval or elliptical cross-sectional shape of one of the monolithic substrates or supports 13 for a catalyst, FIG. 2.
- the housing 11 is provided with an inlet 14 and an outlet 15 for conducting exhaust gases axially to and from the substrate 13.
- the reactor 10 may comprise a single catalytic substrate 13, or several similar substrates in series.
- the outlet 15 also comprises the inlet for a second monolithic substrate 13a identical to the substrate 13.
- the substrate 13 is extruded in a plastic condition to provide a porous cylindrical core or log having axially opposite plane end faces 13b and 13c through which the exhaust gases may flow axially i.e., from right to left in FIG. 1.
- the core or substrate 13 has a cross sectional shape transverse to the axial gas flow similar to the housing 11, but lightly smaller to provide a space 16 between the interior of the housing 11 and the oval periphery of the substrate 13 entirely around the latter periphery.
- a pair of axially spaced grooves 17 are pressed thereinto entirely around its periphery, thereby to compact the plastic material of the core or substrate 13 to reinforce the latter at the regions of the grooves 17 and also to provide peripheral seats for a pair of die formed seal ropes 18.
- their outer corner edges are also compacted to effect rounded edges 17b, thereby to reinforce these edges in contact with the ropes 18 and to avoid sharp edges that would otherwise tend to break under pressure.
- the core 13 is treated with a suitable catalyst and cured to its final hardened condition for assembly in the reactor 10.
- the ropes 18 space the substrate 13 entirely from the interior of the housing 11 and also provide effective seals to prevent gas flow in the space 16.
- the ropes 18 are initially formed from multiple layers 18k, FIG. 4 of knitted stainless steel wire to comprise a compact matrix 18a, phantom view in FIG. 4, having approximately twice the cross sectional area of the final shape 18, solid lines in FIG. 3. Thereafter the matrix 18a is compacted under pressure in a die to the high density shape 18 having a centrally located channel 18b extending the entire length of its outer surfaces.
- the steel wires or fibers in the matrix are selected to withstand the reactor operating temperatures and are preferably less than 0.01 inch diameter.
- a satisfactory mesh 18k comprising 0.0045 inch diameter wire knitted as illustrated in FIG. 4 has been tested satisfactorily.
- each wire shown may comprise multiple thin strands to achieve optimum flexibility with a knit mesh of a given weight.
- Numerous mesh forms having the characteristics of the knitted mesh 18k may be employed to provide a wire matrix of shallow undulations arranged in layers to effect a resilient cushioning of the substrate 13 in the assembled reactor 10, as described below.
- the knit wire pattern as distinct from a woven pattern, is particularly satisfactory because as illustrated in FIG. 4 separate portions of the wire mesh 18k are maintained in spaced relationship and the undulations of the wire are on the order of magnitude of the wire diameter.
- multiple knitted layers are gathered into an elongated rope having the general cross section 18a, FIG. 3, by successively knitting one layer 18k around the other to complete a partially compacted assembly 18a.
- the loops 181 of the various layers are super-imposed on each other at random, so that the interlocking portions 18m of one layer do not necessarily overlie the similar interlocking portions of the adjacent layers, but usually fall within the voids or spaces 18n defined by the individual loops 181 of the adjacent layers.
- the rope 18a is further compacted under considerable pressure between suitable dies to the dense cross section illustrated at 18, FIG. 3, to effect a springy rope-like pad.
- Each housing shell 11 is formed with a pair of inward projections or ribs 19 adapted to seat within the underlying rope groove 18b at the interference fit so as to depress the associated material of the rope 18 into its groove 17 and to spread excess material of the rope 18 laterally into the space 16.
- Spaced laterally by each projection 19 are two inwardly opening channels 20 of the housing shell 11 arranged to receive the laterally displaced material of the ropes 18 snugly and to interlock therewith when the projections 19 are forced into the rope channels 18b.
- the projections 19 and channels 20 of each housing shell 11 cooperate to reinforce the housing shells, to prevent their being buckled out of shape by the clamping force, and also to extend entirely around the circumference of the substrate 13 and overlie the associated ropes 18.
- the ropes 18 interlock the substrate 13 and housing 11 and positively prevent relative motion therebetween.
- the strength of the substrate 13 required to withstand the resulting high pressure forces underlying the ropes 18 is achieved by reason of the aforesaid compacting and reinforcing at the regions of the grooves 17, 17a prior to curing and hardening of the substrate 13.
- the densely compacted ropes 18 provide a limited resiliency to grip the support and housing i.e., the ropes 18 are not compacted to their limits of compressability so as to eliminate all air space between individual wire strands or fibers 181 and 18m of the stainless steel, but they are compacted to the extent that after the individual wires lose much of their resiliency in consequence of being subjected to high operational temperatures, the ropes 18 will still provide adequate mass to retain the fixed spaced relationship between the substrate 13 and housing 11.
- the densely compacted ropes 18 in the finally compacted shape of FIG. 1 provide a high resistance seal to gas flow in the space 16.
- the initial compacting of the mesh 18 prior to the clamping action by the housing shells 11 may be reduced. Also, if the material of the substrate 13 is sufficiently strong to withstand the clamping force, especially when the mesh 18 and correspondingly the clamping force is distributed over a comparatively large peripheral area of the substrate 13, the reinforcing grooves 17 may be eliminated.
Abstract
Description
Claims (14)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/551,442 US3978567A (en) | 1973-03-19 | 1975-02-20 | Method of making a catalytic reactor for automobile |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US34257573A | 1973-03-19 | 1973-03-19 | |
US05/551,442 US3978567A (en) | 1973-03-19 | 1975-02-20 | Method of making a catalytic reactor for automobile |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US34257573A Division | 1973-03-19 | 1973-03-19 |
Publications (1)
Publication Number | Publication Date |
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US3978567A true US3978567A (en) | 1976-09-07 |
Family
ID=26993080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US05/551,442 Expired - Lifetime US3978567A (en) | 1973-03-19 | 1975-02-20 | Method of making a catalytic reactor for automobile |
Country Status (1)
Country | Link |
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US (1) | US3978567A (en) |
Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4007539A (en) * | 1975-04-11 | 1977-02-15 | Ngk Spark Plug Co., Ltd. | Method of clamping a lattice-like ceramic structure body |
US4049388A (en) * | 1976-07-12 | 1977-09-20 | Arvin Industries, Inc. | Center air manifold for catalytic converter |
US4160010A (en) * | 1976-05-28 | 1979-07-03 | J. Eberspacher | Device for purifying exhaust gases |
US4203949A (en) * | 1976-04-23 | 1980-05-20 | Honda Giken Kogyo Kabushiki Kaisha | Catalyst converter for cleaning exhausts of cars |
US4206178A (en) * | 1978-04-08 | 1980-06-03 | Fuji Jukogyo Kabushiki Kaisha | Apparatus for purifying exhaust gases of internal combustion engines |
US4206179A (en) * | 1978-04-08 | 1980-06-03 | Fuji Jukogyo Kabushiki Kaisha | Apparatus for purifying exhaust gases of internal combustion engines |
US4208374A (en) * | 1977-10-31 | 1980-06-17 | General Motors Corporation | Catalytic converter |
US4209494A (en) * | 1978-04-08 | 1980-06-24 | Fuji Jukogyo Kabushiki Kaisha | Catalytic converter for purifying exhaust gases of internal combustion engines |
FR2454514A1 (en) * | 1979-04-16 | 1980-11-14 | Gen Motors Corp | CATALYTIC CONVERTER FOR INTERNAL COMBUSTION ENGINE EXHAUST GAS |
EP0178063A1 (en) * | 1984-09-13 | 1986-04-16 | Minnesota Mining And Manufacturing Company | Catalytic converter for automotive exhaust system |
EP0250384A1 (en) * | 1986-06-16 | 1987-12-23 | Sandvik Aktiebolag | Device for purification of exhaust gases |
EP0363878A2 (en) * | 1988-10-10 | 1990-04-18 | Zeuna-Stärker Gmbh & Co Kg | Catalytic exhaust gas purification device for internal-combustion engines |
US4927608A (en) * | 1987-01-02 | 1990-05-22 | J. Eberspacher | Device for catalytic cleaning of motor vehicle exhaust gases |
DE3939490A1 (en) * | 1988-12-16 | 1990-06-21 | Usui Kokusai Sangyo Kk | An exhaust gas purification arrangement - having two honeycomb members, catalyst, metal housing, a flat-and corrugated strip and interspace |
US5094073A (en) * | 1989-03-17 | 1992-03-10 | J. Eberspacher | Device for the catalytic cleaning or other treatment of internal combustion engine exhaust gases with two exhaust gas treating bodies and a protective ring between them |
US5119551A (en) * | 1989-02-06 | 1992-06-09 | Tennessee Gas Pipeline Company | Method of making a catalytic converter with one piece housing |
EP0561019A1 (en) * | 1992-03-18 | 1993-09-22 | Firma J. Eberspächer | Arrangement for positioning an inner shell in the casing of an exhaust device for vehicles |
US5980837A (en) * | 1997-12-03 | 1999-11-09 | Ford Global Technologies, Inc. | Exhaust treatment device for automotive vehicle having one-piece housing with integral inlet and outlet gas shield diffusers |
US6324758B1 (en) | 2000-01-13 | 2001-12-04 | Visteon Global Tech., Inc. | Method for making a catalytic converter canister |
US6332273B1 (en) | 2000-03-13 | 2001-12-25 | Visteon Global Tech., Inc. | Method for making a catalytic converter assembly |
US20020068025A1 (en) * | 2000-12-04 | 2002-06-06 | Foster Michael Ralph | Catalytic converter |
US6946013B2 (en) | 2002-10-28 | 2005-09-20 | Geo2 Technologies, Inc. | Ceramic exhaust filter |
US20060242951A1 (en) * | 2005-04-29 | 2006-11-02 | Caterpillar Inc. | Refractory material retention device |
US7211232B1 (en) | 2005-11-07 | 2007-05-01 | Geo2 Technologies, Inc. | Refractory exhaust filtering method and apparatus |
US20070104620A1 (en) * | 2005-11-07 | 2007-05-10 | Bilal Zuberi | Catalytic Exhaust Device |
US20070104622A1 (en) * | 2005-11-07 | 2007-05-10 | Bilal Zuberi | Device for Catalytically Reducing Exhaust |
US20080008631A1 (en) * | 2005-03-24 | 2008-01-10 | Emitec Gesellschaft Fur Emissionstechnologie Mbh | Exhaust Gas System With Two Exhaust Gas Treatment Units |
US7444805B2 (en) | 2005-12-30 | 2008-11-04 | Geo2 Technologies, Inc. | Substantially fibrous refractory device for cleaning a fluid |
US7451849B1 (en) | 2005-11-07 | 2008-11-18 | Geo2 Technologies, Inc. | Substantially fibrous exhaust screening system for motor vehicles |
US7563415B2 (en) | 2006-03-03 | 2009-07-21 | Geo2 Technologies, Inc | Catalytic exhaust filter device |
US7572311B2 (en) | 2002-10-28 | 2009-08-11 | Geo2 Technologies, Inc. | Highly porous mullite particulate filter substrate |
US7574796B2 (en) | 2002-10-28 | 2009-08-18 | Geo2 Technologies, Inc. | Nonwoven composites and related products and methods |
US7582270B2 (en) | 2002-10-28 | 2009-09-01 | Geo2 Technologies, Inc. | Multi-functional substantially fibrous mullite filtration substrates and devices |
FR2936009A1 (en) * | 2008-09-17 | 2010-03-19 | Faurecia Sys Echappement | Exhaust gas purifying device for e.g. diesel engine, of motor vehicle, has maintenance unit cooperated with support surfaces of base, where surfaces are supported by lateral face of base and axially recessed in end faces of base |
US7682577B2 (en) | 2005-11-07 | 2010-03-23 | Geo2 Technologies, Inc. | Catalytic exhaust device for simplified installation or replacement |
US20100124854A1 (en) * | 2008-11-17 | 2010-05-20 | Liu Ting-Pan | Structure for improving the voltage difference of a connector |
US7722828B2 (en) | 2005-12-30 | 2010-05-25 | Geo2 Technologies, Inc. | Catalytic fibrous exhaust system and method for catalyzing an exhaust gas |
CN105537882A (en) * | 2016-02-02 | 2016-05-04 | 南通昌荣机电有限公司 | Production technology for rope head taper sleeves |
CN105855798A (en) * | 2016-03-11 | 2016-08-17 | 南通昌荣机电有限公司 | Novel manufacturing method for rope end taper sleeve |
JP2017523336A (en) * | 2014-07-25 | 2017-08-17 | マン・ディーゼル・アンド・ターボ・エスイー | Catalyst unit, catalyst unit manufacturing method, and exhaust gas catalytic converter |
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US3853483A (en) * | 1972-10-18 | 1974-12-10 | Air Prod & Chem | Exhaust gas catalytic treatment system |
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1975
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Cited By (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4007539A (en) * | 1975-04-11 | 1977-02-15 | Ngk Spark Plug Co., Ltd. | Method of clamping a lattice-like ceramic structure body |
US4203949A (en) * | 1976-04-23 | 1980-05-20 | Honda Giken Kogyo Kabushiki Kaisha | Catalyst converter for cleaning exhausts of cars |
US4160010A (en) * | 1976-05-28 | 1979-07-03 | J. Eberspacher | Device for purifying exhaust gases |
US4049388A (en) * | 1976-07-12 | 1977-09-20 | Arvin Industries, Inc. | Center air manifold for catalytic converter |
US4208374A (en) * | 1977-10-31 | 1980-06-17 | General Motors Corporation | Catalytic converter |
US4206178A (en) * | 1978-04-08 | 1980-06-03 | Fuji Jukogyo Kabushiki Kaisha | Apparatus for purifying exhaust gases of internal combustion engines |
US4206179A (en) * | 1978-04-08 | 1980-06-03 | Fuji Jukogyo Kabushiki Kaisha | Apparatus for purifying exhaust gases of internal combustion engines |
US4209494A (en) * | 1978-04-08 | 1980-06-24 | Fuji Jukogyo Kabushiki Kaisha | Catalytic converter for purifying exhaust gases of internal combustion engines |
FR2454514A1 (en) * | 1979-04-16 | 1980-11-14 | Gen Motors Corp | CATALYTIC CONVERTER FOR INTERNAL COMBUSTION ENGINE EXHAUST GAS |
US4239733A (en) * | 1979-04-16 | 1980-12-16 | General Motors Corporation | Catalytic converter having a monolith with support and seal means therefor |
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EP0250384A1 (en) * | 1986-06-16 | 1987-12-23 | Sandvik Aktiebolag | Device for purification of exhaust gases |
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